CATAN

Section: complex math routines (3)
Updated: 2002-07-28
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NAME

catan, catanf, catanl - complex arc tangents  

SYNOPSIS

#include <complex.h>

double complex catan(double complex z);
float complex catanf(float complex z);
long double complex catanl(long double complex z);

Link with -lm.  

DESCRIPTION

The catan() function calculates the complex atan(). If y = catan(z), then z = ctan(y). The real part of y is chosen in the interval [-pi/2,pi/2].

One has catan(z) = 1/2i clog((1+iz)/(1-iz)).  

CONFORMING TO

C99  

SEE ALSO

ccos(3), clog(3), complex(7)


 

Index

NAME
SYNOPSIS
DESCRIPTION
CONFORMING TO
SEE ALSO

linux.jgfs.net manual pages